In this present work the activated charcoal potential, yellow filter and photoperiod/temperature interaction in vitro on the formation of structures like tuber roots of sweet potato Ipomoea batatas L. Lam were evaluated. The experiment with activated charcoal was carried out in glass culture, each tube with 10ml of culture medium. The experiments with yellow filter and photoperiod/temperature were carried out in glass jars content each 15 and 30ml of medium of culture respectivy. The culture medium used in the treatments was the MS. In these three experiments carried out the number of structures like tuber roots dry matter of roots and aerial parts were evaluated. In relation to the activated charcoal, its presence associated with naphthalene acetic acid, benzylaminopurine and kinetin did not induce the formation of structures like tuber roots and reached proportioned low dry matter in both roots and aerial parts. In relation to the yellow filter, its presence associated with growth regulators (naphthalene acetic acid, benzylaminopurine and kinetin) proportioned larger formation of structures like tuber roots, high dry matter of roots and aerial part. The photoperiod (8, 10 and 12 hours of light) associated with temperature (15ºC) proportioned low formation of structures like tuber roots, low dry matter of roots and aerial part.
tuber root; growth regulators; activated charcoal; photoperiod; yellow filter
